We should not have had this story of Pharaoh's butler and baker recorded in scripture if it had not been serviceable to Joseph's preferment. The world stands for the sake of the church, and is governed for its good. Observe, 1. Two of the great officers of Pharaoh's court, having offended the king, are committed to prison. Note, High places are slippery places; nothing more uncertain than the favour of princes. Those that make God's favour their happiness, and his service their business, will find him a better Master than Pharaoh was, and not so extreme to mark what they do amiss. Many conjectures there are concerning the offence of these servants of Pharaoh; some make it no less than an attempt to take away his life, others no more than the casual lighting of a fly into his cup and a little sand into his bread. Whatever it was, Providence by this means brought them into the prison where Joseph was. 2. The captain of the guard himself, who was Potiphar, charged Joseph with them (Gen 40:4), which intimates that he began now to be reconciled to him, and perhaps to be convinced of his innocence, though he durst not release him for fear of disobliging his wife. John Baptist must lose his head, to please Herodias.

The butler - משקה mashkeh, the same as saky among the Arabians and Persians, and signifying a cup-bearer.
Baker - אפה opheh; rather cook, confectioner, or the like.
Had offended - They had probably been accused of attempting to take away the king's life, one by poisoning his drink, the other by poisoning his bread or confectionaries.

And it came to pass after these things,.... After Joseph had been accused and cast into prison, where he had been for some time:

that the butler of the king of Egypt and his baker had offended their lord the king of Egypt; committed some fault, at least were accused of one, which raised his displeasure at them. The Targum of Jonathan says, that they consulted to put poison into his drink and food; which, it is not improbable, considering their business and office, they might be charged with; at least it is much more probable than what Jarchi suggests, that the one put a fly into his cup, and the other a little stone or sand into his bread.